diff --git a/libavformat/sapdec.c b/libavformat/sapdec.c
index eddeddeaea..f8bc0d281c 100644
--- a/libavformat/sapdec.c
+++ b/libavformat/sapdec.c
@@ -142,6 +142,10 @@ static int sap_read_header(AVFormatContext *s)
         }
 
         sap->sdp = av_strdup(&recvbuf[pos]);
+        if (!sap->sdp) {
+            ret = AVERROR(ENOMEM);
+            goto fail;
+        }
         break;
     }